4j29 Kovar Alloy Glass Vacuum Melt Sealing Welding Processing

Kovar Glass-to-Metal Vacuum Hermetic Sealing Service

Description:
Our precision Kovar Glass Vacuum Melt Sealing process delivers ultra-reliable hermetic seals between Kovar alloy and specialty glass components. Utilizing high-temperature vacuum furnace technology, we achieve contamination-free fusion bonding ideal for critical applications requiring extreme environmental protection.

Key Features & Benefits:

✅ Thermal Expansion Match: Kovar alloy (Fe-Ni-Co) precisely matched to borosilicate glass ensures zero stress cracking during thermal cycling.
✅ Vacuum Environment: Eliminates oxidation, prevents bubble formation, and guarantees pure, void-free seals.
✅ Hermetic Integrity: Leak-tight seals (<1×10⁻⁹ atm·cc/s He) for long-term protection against moisture, gases, and particulates.
✅ High-Temperature Stability: Seals withstand extreme temperatures (-65°C to +450°C) and thermal shock.
✅ Electrical Isolation: Glass insulation enables embedded feedthroughs for conductive elements.

Applications:

• Aerospace & Defense Sensors
• Medical Implantable Devices
• High-Power Laser/Optoelectronic Housings
• MEMS & Semiconductor Packages
• Vacuum Interrupter Components

Process Capabilities:

• Custom geometries (pins, windows, headers)

• Multi-pin array configurations

• Strict compliance with MIL-STD-883 standards

• Full metrology & hermeticity testing

Key Technical Terms Used:

• Hermetic Seal: Impermeable barrier to gases/liquids

• CTE Matching: Coefficient of Thermal Expansion alignment

• Feedthrough: Conductive path through sealed barrier

• Borosilicate Glass: Low-expansion, chemically resistant glass